Home > Duplex Steel > Duplex Steel S31803 Tube Fittings
Max Tube Fittings stands out as a top manufacturer and exporter of Duplex Steel S31803 Tube Fittings, crafted for reliable, leak-proof connections in critical fluid and gas transfer systems. This nitrogen-alloyed duplex stainless steel boasts a well-balanced austenitic-ferritic microstructure, delivering remarkable mechanical strength along with resistance to chloride stress corrosion cracking, pitting, and crevice corrosion. These tube fittings are designed with precision for easy installation and a long service life, even under high pressure and temperature. Offered in various sizes, designs, and pressure ratings, Duplex Steel S31803 Tube Fittings ensure safe and efficient performance across demanding industries worldwide.
Duplex Steel S31803 Tube Fittings offer exceptional strength compared to standard stainless steels, showcasing high fatigue resistance and outstanding corrosion resistance in harsh, chloride-rich environments. Their unique dual-phase structure boosts resistance to stress corrosion cracking while ensuring good weldability and toughness. These fittings are not only dimensionally accurate and reusable but also provide secure, leak-proof sealing in hydraulic, instrumentation, and process systems. Built to endure high pressures and fluctuating temperatures, Duplex S31803 Tube Fittings promise long-term reliability, durability, and performance in industrial applications where safety and efficiency are paramount.
| ELEMENT | DUPLEX 31803 |
| NI | 4.50 – 6.50 |
| C | 0.030 max |
| MN | 2.00 max |
| P | 0.030 max |
| S | 0.020 max |
| SI | 1.00 max |
| CR | 22.0 – 23.0 |
| MO | 3.0 – 3.5 |
| N | 0.14 – 0.20 |
| FE | 63.72 min |
| Grades | Density (g/cm 3) | Density (lb/in 3) | Melting Point (°C) | Melting Point (°F) |
| S31803 | 7.805 | 0.285 | 1420 – 1465 | 2588 – 2669 |
At Max Tube Fittings, we are the largest supplier, manufacturer, and exporter of Duplex Steel S31803 Tube Fittings in Delhi, India. Our advanced manufacturing facilities, strategically positioned in the India, enable us to deliver high-quality solutions to meet your specific requirements. With a robust inventory of over 16,000 tons of top-grade materials, we are well-equipped to fulfil your needs promptly. Our commitment to excellence and efficiency ensures we always have the available stock to support your demands.
| STANDARD | UNS | WERKSTOFF NR. |
| Duplex S31803 | S31803 | 1.4462 |
| Straight Union | Bulkhead Union | Reducing Union | Union Elbow | Union Cross | Union Tee |
| Male Connector | Female Connector | Male Bulkhead Connector | Female Bulkhead Connector | Male to Male Elbow | Male Elbow |
| Female Elbow | Male to Female Elbow | Male Run Tee | Male Branch Tee | Female Branch Tee | Female Run Tee |
| Male Adaptor | Female Adaptor | Tube End Reducer | OD Plug | Bulkhead Lock Nut | OD Cap |
Contact us to get a quick quote for your requirement.
Duplex Steel S31803 Tube Fittings are widely used in applications requiring high strength and corrosion resistance, such as oil and gas, chemical processing, petrochemical, marine applications and are ideal for offshore platforms, heat exchangers, compression pottery and desalination plant piping systems Significantly these fittings are also used in water treatment, pulp and paper manufacturing, and electricity generation, providing excellent durability in harsh and corrosive environments, . and highly resistant to pitting, cracks, rust and erosion.
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Standard : ASTM A276, A479 / ASME SA276, SA479
Thickness : 0.6 mm THK to 6.00 mm THK
Size Range : 1/16” 1/2” & 1.5MM to 38.1MM
Outer Diameter : 6.00 mm to 60.00 mm